The medal comes just hours after another teenager - Wanaka's Zoi Sadowski-Synnott - broke New Zealand's 26-year run medal drought with her bronze in the snowboard big air event.

"I've been really working hard on that run for the last four years," Porteous told Sky Sport.

"I've been giving it everything I got and training as hard as I can. For me to do the two best runs of my life back to back, that's insane.

"As you could tell, I had no clue that was coming. I was happy with the way I skied and it was something I could be proud of. For the judges to reflect that, it's insane."

Photo credit: Getty

Porteous opted not to attempt to better his stellar second-round effort, which at one stage had him in first place, cruising through his third and final run, before standing by and nervously waiting for the rest of the field to finish.

"I'd done as much as I could, and if that wasn't enough then it wasn't enough."

He was eventually overtaken by Americans David Wise's (97.20) and Alex Ferreira's (96.40) in the top two spots.

Fellow Kiwi Beau-James Wells produced an impressive effort of his own, finishing just outside of the medals in fourth position with a best score of 91.60.

Meanwhile, there was heartbreak for brother Byron Wells, who was forced to withdraw from the final after injuring his leg during practice.